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    <title>Document</title>
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    <script>
      const res = String.fromCharCode(65);
      console.log(res);

      const letterArr = [];
      // 字母A的code值是65，但因为已经到字母D了，所以直接从69E开始循环
      for (let i = 69; i < 91; i++) {
        letterArr[i] = String.fromCharCode(i);
      }
      console.log(letterArr.splice(66));
    </script>
  </body>
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